I have read as many of these issues and I can research but still cant figure it out..

I have a very modified Camaro but have not changed wiring..
I go to car with battey fully charged and everything comes on dash and aftermarket radio but when I compress the clutch there is no turn over (absoutley so noise or attempt)
I will wait hours and try again and sometimes it turns over and sometimes it still wont.
I have tried a brand new key and moving gears and clutch and no change.
I have also had car battery fully charged along with jumper cables running on it and still nothing. It randomly starts and does not when it wants.
Sometimes after the car starts and while im driving all of the sudden the dash gauges shut off and engine obviously works fine but all digital gauges just drop off as if car is off..

full battery and issues starting...seems the starter is a good place to start. maybe trying test the starter and charging system. i believe auto zone can do it while in the car but that means you got to get it there. gl

I don't know if the Camaro's have a starter solenoid or not but that is where I would start. Seems juice isn't getting to the starter. If they do have a solenoid, you can always touch the positive and negative at the same time with a screwdriver to get it to jump. Used to have to start my 77 Volare that way.

Seems like something loose somewhere cause it stated randomly and the RPM gauge started going on and off along with cluster gauges and all of the sudden they all went off while engine was still running..

i meant that in order for a manual car to start, the clutch must be depressed fully. thereby making the switch. if the switch does not work, the car will not turn over. so maybe it is only working intermittently. but that shouldn't cause all the other issues you are having. might be time to take it to a mechanic